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Suppose X is normally distributed with a mean of 8 and a variance of 4

# Suppose X is normally distributed with a mean of 8 and a variance of 4

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1. Suppose X is normally distributed with a mean of 8 and a variance of 4. What is the probability that X is greater than 0 but less than 8? (Your answer should be correct to one decimal place.) Answer 1 points Question 2 1. A standardized test that has been used by employees to screen job applicants is known to produce scores that are normally distributed with a mean of 70 and a standard deviation of 9. Suppose a particular firm requires applicants to score in the top 20% of test scores before being considered for employment. What score would a job applicant require to be considered by this firm? (Your answer should be correct to one decimal place.) Answer 1 points Question 3 1. If an estimator is said to be unbiased then the population mean equals the sample mean. Answer True False 1 points Question 4 1. If a random sample of size 15 is drawn from a population distribution with standard deviation σ=10 then what will be the variance of the sampling distribution of the sample mean? (Your answer should be correct

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Suppose X is normally distributed with a mean of 8 and a variance of 4

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